Features: Experience precise and durability with our Cobalt Drill Bit Set, featuring M35 cobalt twist drill bits designed to effortlessly penetrate stainless steel, wood, and metal surfaces. Crafted from high speed steel with a cobalt blend, these drill bits boast a blue coating for enhances wear resistance and a straight shank for easy handling and precise metric sizing. Ideal for professional craftsmen, DIY enthusiasts, and home users, this set caters to wide ranges of drilling needs, ensuring reliable performances in various projects. Perfect for both household and workshop applications, these drill bits are suitable for drilling through wood, metal, and plastic, making it essential addition to any toolkit. Encased in a sturdy metal case, this comprehensive set ensures your drill bits remain organized and protected, ready for any task that demands accuracy and strength. Specifications: Component:Stainless Steel Tip Diameter:Approx.1mm-15.5mm Length:Approx.12mm-119mm Shank Diameter:Approx.1mm-15.5mm Overall Length:Approx.34mm-177mm 6Option Type; Package Includes: Package A 1Set/13pcs Cobalt Drill Bits Package B 1Set/19pcs Cobalt Drill Bits Package C 1Set/25pcs Cobalt Drill Bits note: Please allow 1-10mm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual item color.